diff --git a/composer.json b/composer.json
index 3ced8fa8..2d44efdf 100644
--- a/composer.json
+++ b/composer.json
@@ -49,7 +49,8 @@
 		"wp-cli/server-command": "^1.0",
 		"wp-cli/shell-command": "^1.0",
 		"wp-cli/eval-command": "^1.0",
-		"wp-cli/entity-command": "^1.0"
+		"wp-cli/entity-command": "^1.0",
+		"wp-cli/extension-command": "^1.0"
 	},
 	"require-dev": {
 		"phpunit/phpunit": "3.7.*",